| Nihon Kokudo Keikaku Summers | |
| Location: | Japan |
| Establishment: | 1977 |
| Tour: | Japan Golf Tour |
| Format: | Stroke play |
| Month Played: | August |
| Final Year: | 1982 |
| Aggregate: | 275 Teruo Sugihara (1982) |
| To-Par: | −13 as above |
| Final Champion: |  Teruo Sugihara |
The Nihon Kokudo Keikaku Summers (Japanese: 日本国土計画サマーズ) was a professional golf tournament in Japan from 1977 to 1982. It was an event on the Japan Golf Tour from 1978.
| Year(s) | Host course | Location | |
|---|---|---|---|
| 1981–1982 | Budo Country Club | Ichihara, Chiba | |
| 1980 | New Tateshina Country Club | Chino, Nagano | |
| 1977–1979 | Shirasagi Country Club | Utsunomiya, Tochigi |
| Year | Winner | Score | To par | Margin of victory | Runner(s)-up | ||
|---|---|---|---|---|---|---|---|
| 275 | −13 | [1] | |||||
| 280 | −8 | 5 strokes | [2] | ||||
| 206 | +1 | Playoff | [3] | ||||
| 279 | −9 | 3 strokes | [4] | ||||
| 279 | −9 | 3 strokes | [5] | ||||
| 1977 | 209 | −7 | 2 strokes | [6] |